I wrote a simple SVG plotter for the LineUs drawbot made with Processing 2.2.1 and Geomerative Plugin.

Usage:
You can simply open the code in Processing 2.2.1, install the Geomerative plugin (via menu) and run the sketch. Since this plotter is dependent on the SVG functions of Geomerative (flattening and polygonizer) we are stuck with Processing version 2.2.1.